Hack saw



Feb. 20 '1923.

v. Hmm.

HACK SAW.

msn mlm. s. wzl.

` INVENTOR,

BY LA ATTORNEYS Patented Feb. 20, 1923.

Application filed March 5, 1921. Serial No. 449,632.

To all whom 'it may concern:

Be it known that I, VINCENT FLINN, a citizen of the United States,residing at New York, county and State of New York, have made a certainnew and useful Invention in Hack Saws, of which the following is aspecification.

rlhis invention relates to hack saws wherein the saw blade is adjustableto diii'erent positions, and has for its object the production of acutting device whereby it is possible to so position the cutting bladethat the'saw maybe used in diii'erentpositions and as a close cut saw.

A further object of my invention includes the provision of aninexpensive, efficient, but rugged and readily adjustable sawvor cutterblade holder Aand fastenerfor holding and for accommodating blades ofdifferent lengths and of diderentcutting qualities and capacities.

Other objects will appear hereinafter, I attain the objects of myinvention by a mechanism illustrated in the accompanying drawing, inwhich-` Figure 1 is a side elevation of my device; Figure 2 is a detailview of the outer blade holder and adjacent means viewed in thedirection of the arrows on line 2,-2 of Fi 3; Fig. 3 is a section on theline 3-3 of 4ig.

Fig. 4 is a section on the line 1 4 of Fig. l, showing` details of theinner blade holder and adjuster, and j Fig. 5 is an enlarged viewpartially in section of said inner blade holder andadjuste'r. v

Referring now to the drawing, in which similar numerals refer to similarparts, 9 represents a main saw frame provided withl a. co-extensivehandle 10, and having an extension 11. The main saw frame is providedwith an inner swivel bearing 12, in which is positioned the inner bladeholder and adjuster 18. On the extension of the frame 11 thereisprovided a similar outer swivel bearing 1e, having an outer adjustableblade holder 15. The blade holder 13 has a screw extension 16 at oneend, and one or more seating and .holding positions 17 and 18, providedwith holding pins 19 and 20. rThis holder blade is loosely fitted in theswivel bearing 12, and is ad justably held in position by an adjustingand locking nut 21. The outer blade holder and adjuster is also providedwith saw seats 17 andl 18 similar to those of the inner holder. holderthere is an adjusting and locking nut 22. This locking nut is `providedwith-one or more extensions 23, which/t into seats On the screwextension of the outer 2/1`for the purpose of deiinitely positionino"the saw blade holder and giving the desire 1 position to the saw blade.It is apparent that the bevel seats 18 and 18 position land hold thesaw-blade outside of the eXtreme points of the blade holders, andthereby permit -close cutting, not only as shown in Fig. 1, but invarying positions about the pivotal axis of said'blade holders.

For the purpose .of accommodating saws of different lengths, there isprovided an extension ratchet on anextension frame 11, which comprisesnotchesA 25 vadapted to lit into seats 26. f

In practice l find it .convenient toy place a saw or cutter blade 27 onthe respective.

seats, as shown in Fig. 1, for example, there? j. i" after adjusting andlocking the saw blade in position. When the blade is positioned at rightangles to the plane of the frame, 1

am enabledto use my saw as a close cut saw, whereby I am enabled tooperate in positions which it has heretoforebeen imv possible tooperate'` because the vcutting blade, by reason of my holderconstruction, lies and operates outsideof the projections ofjany partsof the saw frame and handle. lf it is desired to use the cutter bladein. other positions, it. is only necessary to unlock the nut 21, adju-stthe blade, in the de? sired position andagain lock. For certain purposesit may be desirable to positionthe saw on seats 17 and 17. j j

Having now set forth the objects and nature of my invention, and aconstrucsoy tion embodyingthe same, what l claim as new and useful andof my own invention,`

and desire to secure by Letters Patent, is:

1. In a close cutsaw, an adjustable frame,

saw blade holders on said frame, said holders having lateral projectionswhereby the plane of the saw blade is'positioned beyond the y utmostprojection in the same directionof any part of said frame.

2. n a close cut saw, a frame, swivel rjoints .on said Jframe, and meansin said s joints for holding the cutting portiony of fastened in theaxial alignment beyond the utmost projection in the same direction ofany part of the saw frame. 10

In testimony `whereof I have hereunto set my hand on this 28 day ofFebruary, A. D.,

\ VINCENT FLINN.

